#system("wget https://storage.googleapis.com/gatk-best-practices/somatic-hg38/af-only-gnomad.hg38.vcf.gz /data/af-only-gnomad-hg38.vcf.gz")
#system("wget https://storage.googleapis.com/gatk-best-practices/somatic-hg38/1000g_pon.hg38.vcf.gz /data/1000g_pon.hg38.vcf.gz")